will palrstinians be safe if there were no israelis? ...
From an ethnic cleansing extermination, yes; but it is already too late for the Negev Bedouins .
Israeli's extermination of that culture is already complete and only about 10% of the former population is still alive in the seven concentration camp "cities." Israel has forced the majority of Negev Bedouins into these camp/cities and the surrounding guards prevent most from escaping back to the desert. Some do slip out past the guards on moon less nights and try to live the old way in the desert: Subsistence farming with a few animals, but Israel routinely bulldozes their simple shacks into rubble and has been spraying their gardens with herbicide since 2002, so their number are also dwindling. (Some even “voluntarily” return to the camp/cities when hungry enough and their animals are dead from lack of grass. It is amazing how effective modern herbicides are.) In about 15 years more the "final solution" to the Bedouins occupying land Israelis want and are setting* in will be complete. - I.e. all the Bedouins will have fled or be dead.
Hitler was not able to do as effective job as Israel is doing on the Negev Bedouins; however, don't expect me to congratulate Israel when Israel’s “final solution” to the Negev Bedouins problem is 100% done. (Morally these exterminations are the same.)
I think it reasonable for the Palestinians to expect the same, especially as they, unlike the Bedouins, are throwing more than a few stones as their contribution to the chain of retaliations. It will take longer, as there are more Palestinians, and they have allies in other countries, but in 100 years or so the present policy of High Kill ratios, cutting off energy for water pumps, etc. may work as a “final solution” to the “Palestinian problem.” (Assuming, which I doubt, that none of their allies supplies them with a very-lethal, biological aerosol of a highly contagious agents first. If that should happen, it probably means the extermination of the Israelis. – Their low birth rate and lower numbers decreases the chance some genetic immune/ resistant Israelis will survive to repopulate.)
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*One of the new settlements unearthed ancient Bedouin burial ground, more than 5000 years old according to the Israeli specialists. But of course the Bedouins had no right to that land. - They had only occupied it for approximately 100 times longer than Israel has existed.